Run of unchanged for cherrytree

Try this locally package):

debcheckout cherrytree
cd cherrytree
just-build
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Processing triggers for dictionaries-common (1.28.4) ...

(Reading database ... 27035 files and directories currently installed.)
Removing autopkgtest-satdep (0) ...
autopkgtest [20:03:24]: test command1: cherrytree -h
autopkgtest [20:03:24]: test command1: [-----------------------
Unable to init server: Could not connect: Connection refused

(cherrytree:22556): Gtk-WARNING **: 20:03:24.174: cannot open display: 
autopkgtest [20:03:24]: test command1: -----------------------]
autopkgtest [20:03:24]: test command1:  - - - - - - - - - - results - - - - - - - - - -
command1             FAIL non-zero exit status 1
autopkgtest [20:03:24]: test command1:  - - - - - - - - - - stderr - - - - - - - - - -
Unable to init server: Could not connect: Connection refused

(cherrytree:22556): Gtk-WARNING **: 20:03:24.174: cannot open display: 

Full worker log Full build log